| Synonym | Author | CoL Status | Valid | Synonymy | Combination |
|---|---|---|---|---|---|
| Cosa costata | (Bernard, 1896) | accepted name | Yes | senior synonym |
new combination |
| Hochstetteria costata | Bernard, 1896 | synonym | No | senior synonym |
original combination |
| Philobrya costata | (Bernard, 1896) | synonym | No | senior synonym |
new combination |